So I've had a problem with my desktop where I was watching Netflix and it crashed to a black screen and the PC was on, so I hard reset the PC and it would boot but the screen would not load windows, it would load bios but windows wouldn't turn on. So I was confused so I ran the PC in safe mode and I decided to do a chkdsk /r for my C: drive. The percentage was rising really quickly but has been stagnant for 5 hours from the time this is posted and I was curious if this is normal. The chkdsk is not the command prompt one, it is the one on the bios page. At what point if at any should I turn off my PC? How long should this take and thank you to anyone/everyone who responds. 
**EDIT** Forgot to include that I got on Safemode using the recovery system and I did do chkdsk and I got a corrupted file once but it was in "read-only" so it wouldn't fix the corrupted file. Update and it's still at 16% 8 hours later, and I don't know if this matters but it still accepts new USB devices to be added.

**EDIT** Forgot to include that I got on Safemode using the recovery system and I did do chkdsk and I got a corrupted file once but it was in "read-only" so it wouldn't fix the corrupted file. Update and it's still at 16% 8 hours later, and I don't know if this matters but it still accepts new USB devices to be added.